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SasView / sasmodels

Package for calculation of small angle scattering models using OpenCL.
BSD 3-Clause "New" or "Revised" License
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Equation one in Cylinder model documentation is incorrect. #495

Closed butlerpd closed 1 year ago

butlerpd commented 2 years ago

The P(Q) equation for an oriented cylinder has a sin(alpha) appended at the end. I believe that is incorrect. Only when integrating over all angles (for isotropic case) would one add sin(alpha) dalpha for polar coordinate integration?

RichardHeenan commented 2 years ago

I agree ! (Should have seen that when I last revised the docs.) The sin(alpha) is for the number of cylinders at that orientation if you think about them pointing uniformly in all directions towards the surface of a sphere. Richard